One-dimensional slices in X-direction through run 3S1-hr at time T = 8.53 Myr. The Y and Z coordinates are chosen appropriately for the slices to include the position of the only remaining star at that time (25 M_⊙ , at X = −30 pc, indicated by the star in the middle diagram). Top: positive X-velocity (blue, dashed line), negative x-velocity (red dash-dotted line) and sound speed (solid black). Middle: pressure (logarithmic). Bottom: density (logarithmic). See text for details.